Current camera:  Canon D30 (the original first generation dslr)

Current wide angle lens: Canon 20-35mm f3.5-4.5

Problem: I want wide angle capability down to about the equivalent of a 24mm
lens in 35mm format.

Purpose: My principal use of a camera is for vacation snapshots for personal
use i.e., "record" photographs, not art.

Note: Cost is not a big constraint but I don't usually buy things I don't
need.  I used an Olympus OM1 and a Rollei 35s for over 20 years until I
bought the D30 - I missed the whole automatic film camera era!  I am
satisfied with the quality of photographs produced by the D30 and 20-35mm
lens. If I could buy a wider angle lens for the D30, that is what I would do
but of course, nobody makes one.

Option 1:  Buy a Digital Rebel or a 30D plus a Canon 10-22mm f3.5-4.5 lens
(or a 3rd party lens).

Option 2:  Buy a Canon 5D.

I am leaning toward the 5D for a couple of practical reasons not directly
related to image quality; there will be the weight of one less lens to carry
around and fewer lens changes will be required.  In addition to the Canon
20-35mm f3.5-4.5, I also travel with and use a Canon 28-135mm f3.5-f5.6 IS
and a Canon 70-300mm f4-f5.6 IS.  I guess the D30 might still have some
limited use with the long lens because of its 1.6 sensor factor but I
probably would not bother to lug around an extra body just for that.

Are there any important considerations I am missing in my assessment?

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